When someone's face clearly shows signs of having had work done, pulled back skin, large lips, funny smile, etc. This is PSF or Plastic Surgery Face
1: WOW - her smile was permanently attached to her face.
2: No kidding, but it IS permanent; that is a bad case of PSF
2: No kidding, but it IS permanent; that is a bad case of PSF
by Stoolie February 7, 2017

"Those girls at the One Direction concert are such PSFs"
"I PSF'ed so hard when he made eye contact with me"
"That girl is such an annoying PSF"
"I PSF'ed so hard when he made eye contact with me"
"That girl is such an annoying PSF"
by Thecreatorofthephrasepsf September 13, 2015

"Pure Sober Fun". The type of fun and partying that occurs with your parents or goody-goody friends. It is likely that there will be no alcohol or drugs involved, only board games. The 'fun' is used sarcastically because in reality, there is no fun in being purely sober.
by ginnefuh December 15, 2018

Acronym for Potential Swine Flu. This refers to catching Swine Flu by hooking up with a fat chick. The chick herself would be referred to as the PSF.
by Rhynon July 1, 2009

Post Shit Fart(s) or PSF syndrome
after taking an exceptionally large shit, the series of farts that come afterwords to really clear the bowels out.
after taking an exceptionally large shit, the series of farts that come afterwords to really clear the bowels out.
Johnny:"Damn why do you keep farting?! you just took a huge dump!!"
Joey:"Dude im having a Post Shit Fart(PSF) attack right now, my body is just making sure theres nothing left in there."
Joey:"Dude im having a Post Shit Fart(PSF) attack right now, my body is just making sure theres nothing left in there."
by johnsonlightmeup October 4, 2009

Plastic Surgery Face. When too many plastic surgeries have caused someone's face looks like a half melted doll's head.
If you were the hot chick in an 80's hair band video, chances are you now have a serious case of PSF.
by Guy Whitey Corngood April 11, 2016

PSF or "Permanent Stank Face" is defined as someone who looks as though their face has been fixed permanently as though they smelled a pile of steamy crap.
by Libertynlaw June 3, 2018
